Abin Sur is a bearer of the Green Lantern Ring and one of the most powerful of the Corps. The abilities the ring grants him are:
•Artificial Intelligence: Every ring has a connection to the Main Battery on Oa, which taps into an artificial intelligence. It acts as an "on-board computer," telling the wearer what they need to know. It can either respond out loud, or silently directly to the wearer's mind. The AI contains a large database of information that may be crucial to a Lantern's success. The ring also translates nearly every language to and from the wearer (though they have difficulty translating profanity), which is why the Corps can communicate with each other. When the bearer of a Green Lantern ring dies, the ring will seek out a suitable replacement for their sector. The AI can be used to play a holographic playback sequence complete with colors across the spectrum based on information in memory banks. The ring can dictate when to pause or stop the playback should an interruption arise where the Lanterns undivided attention is needed. The AI can also alert the wielder of incoming threats or of attempts to manipulate the wielders construct by an outside party.
•Communicator: The ring can act as a personal communicator between Green Lanterns. They have also been seen connected to telephones.
•Costumes: The wearer of the ring may create any costume they choose, based on their personal preferences, whenever they choose. The ring projects the costume over any clothes already worn at the time. The only rules that the Guardians of the Universe implement on the creation of a individual costumed is that the ring bearer display the insignia of the Green Lantern Corps.
•Energy Projection: The rings can also project beams, form protective bubbles and force fields, and fire destructive blasts. Sometimes, depending on the wearer, the beams and blasts make sounds. Kilowog's ring is one such example of blasts making sounds.
•Energy Constructs: The rings can construct anything the wearer can imagine from hard-light energy, as long as they are willing to make it. The more determined the wearer is, the more complex and intricate these things can be. The constructs can even be so complex as to form working machines, computers, and even people.
•Flight: The ring allows the wearer to fly in atmosphere or in space, and can achieve incredible speeds, moving from planet to planet in a matter of hours.
•Matter Manipulation: A Green Lantern can use their ring to manipulate nearby matter, such as water, for various purposes such as a construct that acts like an energy construct but can block something yellow and may serve a purpose that an energy construct couldn't perform.
•Recharging: The rings need to be recharged by means of a Power Battery. Other large sources of power may be used to recharge a power ring, however effectiveness may vary. The internal power source of a Manhunter Android is, in effect, the same as a power battery, and can be used to recharge a power ring. During the JLA / Avengers crossover, a Cosmic Cubewas used to recharge a depleted ring, although this is not an ideal solution and is available if there are no other options.
•Temperature Control: The Ring can increase or decrease the temperature of anything, even something as large as stars, or even create bubbles of intense heat or cold, even down to Absolute Zero. This could be seen in the recent Sinestro Corps War when Sallak used his ring to incase an enemy in a force bubble an incinerate him.
•Wormhole/Warps: The ring can open wormholes to cut down on distance.
•Healing: A wielder can command a ring to heal him/her/itself of any injures incurred. It can also heal others. This ability however cannot regenerate lost limbs.
•Energy twin: The ring can create an energy copy of the wielder which is connected to the ring wielder, any information the twin gathers is transferred to the wielder upon touch while others cannot see this twin apart from fellow Green Lanterns. (An ability which has not been seen for some time)
•Sub-routines: The power rings have inner programmings or mechanisms which can executed without the users permission. One such sub-routine is the autoshield. This shield automatically protects a wielder from external harm and has been proven to be capable of protecting the wielder from planetary level attacks.

Mental Incapacitation: The ring cannot be wielded correctly if the wearer is under the influence of drugs or if there is an involvement of neural interference.
Yellow Impurity: In the beginning the Green Ring was vulnerable to the color yellow. It was unable to defend against attacks from wielders of the Sinestro Corps as well. This weakness however has now be changed and can be overcome by veterans who have the ability to overcome great fear.
Recharge: Previously had to be recharged every 24 hours or when it has been depleted of energy. This can be accomplished if the bearer of the ring recites an oath into his power lantern while holding the ring to it. However now, the power ring only needs to be recharged when it runs out of energy.
Red Lantern Corps. Bearers of the red ring have the ability to drain a Green Power Ring of its energy. The ring of a Blue Lantern however has the ability to charge a Green Lantern Ring or negate this negative effect.
(Previous Weaknesses)
Ability To Kill: One of the main weaknesses of the Power Rings that greatly disturbed Sinestro was the fact that the bearers of the Green Lantern Ring were unable to kill. Recently however, this restriction on the rings has been lifted but murder is still against the law of the GL Corps.

Honored Fallen Lantern of Space Sector 2814. Predecessor of Hal Jordan.
Before he became a Green Lantern, and predecessor to Hal Jordan, Abin Sur was a history teacher on the planet Ungara. His ring was passed to him by the Green Lantern Stakoar sometime around the Earth year 1860.

Abin Sur was created by Gil Kane and John Broome in the classic first appearance of the Green Lantern, Showcase #22. His character would be heavily influenced by Alan Moore's short story "Tygers" (Tales of the Green Lantern Corps Annual #2) which introduced the groundwork for Geoff John's contemporany retcon of Abin Sur, as the first Lantern to learn the prophecy of the Blackest Night.